// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package client

import (
	"testing"

	"github.com/stretchr/testify/require"
)

func TestRefCountIncRefInvalidRefCount(t *testing.T) {
	rc := refCount{}
	rc.SetRefCount(-1)
	require.Panics(t, func() { rc.IncRef() })
}

func TestRefCountIncRefSuccess(t *testing.T) {
	rc := refCount{}
	require.Equal(t, 1, rc.IncRef())
}

func TestRefCountDecRefInvalidRefCount(t *testing.T) {
	rc := refCount{}
	require.Panics(t, func() { rc.DecRef() })
}

func TestRefCountDecRefSuccessDestructorNotCalled(t *testing.T) {
	rc := refCount{}
	rc.SetRefCount(2)
	var called bool
	rc.SetDestructor(func() { called = true })
	require.Equal(t, 1, rc.DecRef())
	require.False(t, called)
}

func TestRefCountDecRefSuccessDestructorCalled(t *testing.T) {
	rc := refCount{}
	rc.SetRefCount(1)
	var called bool
	rc.SetDestructor(func() { called = true })
	require.Equal(t, 0, rc.DecRef())
	require.True(t, called)
}

func TestRefCountDecRefSuccessDestructorIsNil(t *testing.T) {
	rc := refCount{}
	rc.SetRefCount(1)
	require.Equal(t, 0, rc.DecRef())
}
